From 748f921ad1997a464fb8963d0ba2c5bb5e036b1b Mon Sep 17 00:00:00 2001
From: David Conrad <lessen42@gmail.com>
Date: Sat, 24 Jul 2010 22:44:31 -0400
Subject: [PATCH] VP8: Unroll decoding segment update

---
 libavcodec/vp8.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/libavcodec/vp8.c b/libavcodec/vp8.c
index 8c0380315e..9b07608078 100644
--- a/libavcodec/vp8.c
+++ b/libavcodec/vp8.c
@@ -627,9 +627,10 @@ void decode_mb_mode(VP8Context *s, VP8Macroblock *mb, int mb_x, int mb_y, uint8_
 {
     VP56RangeCoder *c = &s->c;
 
-    if (s->segmentation.update_map)
-        *segment = vp8_rac_get_tree(c, vp8_segmentid_tree, s->prob->segmentid);
-    else
+    if (s->segmentation.update_map) {
+        int bit  = vp56_rac_get_prob(c, s->prob->segmentid[0]);
+        *segment = vp56_rac_get_prob(c, s->prob->segmentid[1+bit]) + 2*bit;
+    } else
         *segment = ref ? *ref : *segment;
     s->segment = *segment;